On my birthday, I just can't see my horoscope.

The obvious movement of the sun passes through your sign. When you were born, the position of the earth formed a straight line with your constellation and the sun, and the sun just blocked your constellation! I think the constellation is actually just a symbol, and your nature has little to do with this constellation. Your nature is caused by the combined factors of gravity, light and electromagnetism of the earth and the sun in the ten months before you were born. To sum up, our descendants will match this personality with this constellation when you are born! Take Scorpio as an example. When Scorpio was born, the earth moved between the autumnal equinox and the winter solstice. On the map (you can have a look if you are interested), Scorpio is projected in the southern hemisphere in equatorial coordinate system. You can look at the sun map of the earth. Scorpio can only be projected into the southern hemisphere if it is located on the opposite side of the connecting line between the earth and the sun.